Abstract: An optical information recording/reproduction apparatus includes a radiation device for radiating a light beam onto an information recording medium, a converging device for converging the light beam reflected by the information recording medium, a first device for splitting the converged light beam into two light beams, a second device for guiding the two split light beams onto a single light-receiving surface, which can receive the two light beams, via optical paths having different optical path lengths, the second device guiding the two light beams, so that one of the two split light beams is projected onto the light-receiving surface at a position before the light beam passes a convergent point thereof, and the other light beam is projected onto the light-receiving surface at a position after the light beam passes a convergent point thereof, an integrated photodetector including at least two photodetection regions for receiving the light beams on the light-receiving surface, a size, in one direction, of ea

Abstract: A heat exchanger is provided with a first tank and a second tank. Heat transfer tubes are disposed between the tanks and are connected to the tanks to place the tanks in fluid communication. At least one of the tanks is divided into chambers by a partition. A reinforcement plate member is disposed in at least one of the first and the second tanks for reinforcing the tank to prevent deformation of the tank due to an increase of the pressure within the tanks. The reinforcement plate member is not connected to the partition.

Abstract: A process for gas phase synthesis of diamond using a DC plasma jet where a plasma jet generated by DC arc discharge using a DC plasma torch is made to strike a substrate and grow diamond on the substrate, wherein use is made of a plurality of plasma torch anodes, these are arranged coaxially in a telescoped structure, a magnetic field is applied to these in accordance with need to cause the arc to rotate or the electrode is rotated so as to perform gas phase synthesis of diamond.

Abstract: The invention relates to heat exchangers and methods of manufacturing heat exchangers. The heat exchanger includes a pair of tanks, each of which includes a plurality of connection holes aligned in substantially parallel rows, and a plurality of heat transfer tubes. The plurality of tubes fluidly interconnects between the pair of tanks by insertion into the tanks' connection holes.

Abstract: There is provided a mounting construction which prevents leads of a semiconductor device from being short circuited when the semiconductor device is mounted on a mounting board so that mountability of the semiconductor device is improved. A plurality of outer leads extend from sides of a package of the semiconductor device. A mounting board has a surface on which a plurality of terminals to be electrically connected to the semiconductor device are provided. A mounting member is mounted on the mounting board separately from the semiconductor device. The semiconductor device is attached to the mounting member. The mounting member has a frame member forming a space in which the semiconductor device is placed. A first connecting lead has a first lead connecting portion and a first external connecting portion to be connected to a one of terminals provided on the mounting board. The first external connecting portion extends along a bottom surface of the frame member.

Abstract: A process for producing diamond includes a step of bringing a columnar cathode and a tubular pilot anode provided concentrically around the cathode, into proximity to a plasma jetting port of a front end portion of a tubular main anode provided concentrically around the pilot anode. According to the process, a voltage is applied across the cathode and the pilot anode to convert a pilot gas to the form of a plasma. Then, the cathode is moved away from the pilot anode along a common axis. The process also includes the step of holding the discharge voltage between the cathode and the pilot anode at a first preselected voltage, and then applying voltage across the cathode and the main anode to convert a main gas to the form of a plasma. Subsequently, at least the pilot anode is moved away from the main anode along the common axis while maintaining the discharge voltage between the cathode and the pilot anode at the first preselected voltage.

Abstract: A heat exchanger includes a first tank and a second tank, an inlet and an outlet each connected to either the first tank or the second tank, and a plurality of panel units provided between and connected to the first and second tanks. Each of the panel units has a plurality of tube portions formed as fluid paths and a plurality of plate portions connecting adjacent tube portions and having a thickness less than a thickness of the tube portions. The heat exchanger is lightweight, can be easily assembled and can have a high efficiency in heat exchange.

Abstract: A zinc-plated steel sheet having a resin coating film formed on the surface is obtained by forming a chromate treating layer on the surface of a base steel sheet plated with zinc or a zinc alloy, said chromate treating layer being deposited in an amount of 1 to 200 mg/m.sup.2 in terms of metal chromium, followed by forming a resin coating film on the chromate treating layer in a thickness of 0.1 to 5 .mu.m, said resin coating film being based on a composite resin material including a resin composition and at most 50% by weight of silica, said resin composition containing an ethylene-based ionomer resin and a silane compound having in the molecule a single silicon atom and 2 to 4 silyl ether bonds and/or its condensate.

Abstract: A heat exchanger, such as an evaporator, includes an upper tank and a lower tank and a plurality of heat exchange units extending between the upper and lower tanks. Each heat exchange unit includes a plurality of pipe members, each having a longitudinal central axis, which place the upper and lower tanks in fluid communication. The pipe members of each heat exchange unit are arranged such that their longitudinal central are aligned in a first plane. The heat exchange units are oriented such that the first plane is perpendicular to a flow direction of air which passes through the heat exchanger. Each heat exchange unit further comprises a plate member which extends along a second plane which is parallel to the first plane. The plate members are provided with a plurality of rows of louvers and a plurality of plane regions. The pipe members are connected to the corresponding plane regions of the plate member.

Abstract: An optical information recording/reproducing apparatus includes a semiconductor laser having plural light emitting parts within a chip, so that plural light spots are formed on an information recording medium to effect recording/reproduction of information and focusing error signal detection, utilizing plural light beams emitted from the plural light emitting parts. Light spots other than a light spot for the focusing error signal detection are turned off until a focusing pull-in operation is completed.

Abstract: An optical system for an optical information recording/reproduction apparatus, includes a light source, an objective lens for focusing a light beam from the light source on a recording medium, a beam splitter arranged between the light source and the objective lens, a detector for detecting a light beam split by the beam splitter, a galvano mirror arranged between the objective lens and the beam splitter, the galvano mirror having an opening, and a sensor for receiving the light beam from the light source via the opening.

Abstract: A heat exchanger includes a first tank and a second tank, an inlet and an outlet each connected to either the first tank or the second tank, and a plurality of panel units provided between and connected to the first and second tanks. Each of the panel units has a plurality of tube portions formed as fluid paths and a plurality of plate portions connecting adjacent tube portions and having a thickness less than a thickness of the tube portions. The heat exchanger is lightweight, can be easily assembled and can have a high efficiency in heat exchange.

Abstract: An apparatus for a vapor deposition of diamond by:effecting an arc discharge while feeding a discharge gas between an anode and a cathode of a thermal plasma chemical vapor deposition device;radicalizing a gaseous carbon compound by feeding the gaseous carbon compound to a generated plasma jet; andpermitting said radicalized plasma jet to impinge on a substrate to be treated, whereby a film of diamond is formed on said substrate.

Abstract: An optical information recording/reproducing apparatus which can prevent an optical system from being impossible to use due to its contamination, and in which an optical system need not be cleaned in case that it is not contaminated.The apparatus includes a contamination detection device for detecting contamination of an optical system of the optical information recording/reproducing apparatus. The contamination detection device includes a light source, a first detector for monitoring an output of a light beam emitted from the light source, an optical system for focusing the light beam emitted from said light source on an information recording medium, a second detector for receiving the light beam emitted from said light source and passing through said optical system and a processing device for comparing outputs from said first and second detectors.

Abstract: The present invention is directed to a heat exchanger, such as an evaporator for an automotive air conditioning refrigeration circuit. The heat exchanger includes a serpentine tube in which the interior space is divided by a plurality of parallel partition wall into a corresponding plurality of essentially parallel passages through which refrigerant fluid flows, and inlet and outlet mechanisms connected to the two opposite terminal ends of the serpentine tube, respectively. The inlet mechanism comprises a cylindrical header pipe portion which is fixedly disposed at one terminal end of the serpentine tube along the depth of the serpentine tube, and a separate cylindrical conducting pipe portion of which one terminal end is connected at a right angle to the inner side section of the air outflow region of the header pipe portion.

Abstract: A method for vapor deposition of diamond by effecting an arc discharge while feeding a discharge gas between an anode and a cathode of a thermal plasma chemical vapor deposition device, radicalizing a gaseous carbon compound by feeding the gaseous carbon compound into a generated plasma jet, and permitting the radicalized plasma jet to impinge on a substrate to be treated, whereby a film of diamond is formed on the substrate.

Abstract: A process and apparatus for producing a diamond film from a gas phase, in which a fuel gas is burnt by oxygen gas in a torch, to thereby provide a gas flame jet having a high temperature and high speed sufficient to form a high quality diamond film on a substrate, by an unlimited use of various kinds of combustible carbon compound gases as the fuel gas. A process and apparatus for producing a diamond film from a gas phase, in which a thermal spray material is fed to a combustion flame to thereby form an intermediate layer of a mixture of the thermal spray material and diamond between a substrate and a diamond film, to thereby provide a high purity diamond film having an improved adhesion to the substrate.

Abstract: A multi-layered type heat exchanger for a refrigerant fluid circuit is disclosed which includes a plurality of substantially parallel flat tubes. Each flat tube includes a partition wall for dividing its interior into two fluid passages. A plurality of fin units are disposed between the plurality of flat tubes. A header pipe has a plurality of slits for inserting upper ends of the flat tubes, respectively, and at least one partition wall to divide the interior thereof into at least two chambers. A seal member sealingly closes lower open ends of the flat tubes. Thus, since the height and length of the flat tubes can be easily adjusted, various sizes and designs of heat exchangers can be easily and cost effectively produced.

Abstract: A process and apparatus for producing a diamond film from a gas phase, in which a fuel gas is burnt by oxygen gas in a torch, to thereby provide a gas flame jet having a high temperature and high speed sufficient to form a high quality diamond film on a substrate, by an unlimited use of various kinds of combustible carbon compound gases as the fuel gas. A process and apparatus for producing a diamond film from a gas phase, in which a thermal spray material is fed to a combustion flame to thereby form an intermediate layer of a mixture of the thermal spray material and diamond between a substrate and a diamond film, to thereby provide a high purity diamond film having an improved adhesion to the substrate.

Abstract: A serpentine type evaporator for use in a refrigeration circuit, which comprises a serpentine flat tube including a plurality of spaced essentially parallel planar portions and a plurality of bent portions, fins interposed between opposed outer surfaces of the serpentine flat tube, an inlet header pipe connected to one end of the serpentine flat tube, an inlet pipe connected to the inlet header pipe, an outlet header pipe connected to the other end of the serpentine flat tube, and an outlet pipe connected to the outlet header pipe. At least one of the inlet pipe and the outlet pipe are connected perpendicularly to one of said inlet header pipe or the outlet header pipe.